Citation

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Ghassemi, F., Etminan, H. & Ferguson, J., 1992. A reconnaissance investigation of the major Palaeozoic aquifers in the Canning Basin, Western Australia, in relation to Zn-Pb mineralisation. BMR Journal of Australian Geology and Geophysics  13:1:37-57. Bureau of Mineral Resources, Geology and Geophysics, Canberra.

Abstract

The Canning Basin is a large sedimentary basin with an onshore area of 430 000 km2. It has a thick, discontinuous succession of Palaeozoic and Mesozoic marine and continental sedimentary rocks covered by Cainozoic surficial sediments. It contains several Zn-Pb sulphide deposits of Mississippi Valley type, mainly in the Lennard Shelf and along the Admiral Bay Fault. To provide a framework for understanding the mechanism of this mineralisation, we made a reconnaissance study of the Palaeozoic aquifers, based on an analysis of data from 30 oil exploration wells. The major Palaeozoic aquifers in the basin are the Early Permian Poole Sandstone, the Late Carboniferous to Early Permian Grant Group, and the Devonian Tandalgoo Sandstone. These aquifers have a complex structure owing to tectonic and erosional effects, and they are interconnected with the younger and shallower aquifers. The general direction of groundwater flow in the Palaeozoic aquifers is from the southeast toward the west and northwest. Groundwater velocity is in the range of 0.2 to 0.5 m y-1, and temperature ranges from 30 to 83°C, Groundwater salinity is low at the margins of the basin, but increases with depth and along the flow lines . Our study suggests that the present hydrogeological regime is basically different from those active in the Silurian to Permian, the interval during which the Zn-Pb deposits are considered to have formed. Compaction-driven and gravity-driven fluid-flow models for the formation of the Zn-Pb deposits are considered. A geopressured zone encountered in one location is evidence that the ore-forming fluids could have been generated in deeper parts of the basin, and expelled by compaction into shale-enclosed sandstone lenses. These geopressured lenses could subsequently have been faulted, and the potential ore-forming fluids released. There is insufficient information on the tectonics, palaeotopography, and age of the mineralisation to assess the gravity-driven fluid flow-modeL
Google map showing geographic bounding box with values North bound -16.0 East bound 129.0 West bound 117.5 South bound -24.0
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Product Type/Sub Type

nonGeographicDataset - GA Publication - Journal

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license
Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1992

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Journal
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-16.0
East bound
129.0
West bound
117.5
South bound
-24.0

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Unknown

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onLine

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pdf

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Canberra
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Country
Australia
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Metadata File Identifier

fae9173a-70f6-71e4-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2015-03-23

METADATA SECURITY CLASSIFICATION

unclassified

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pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

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1800 800 173 (within Australia);
 
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